Rotary pump



F. N. IMHOFF, J. HUTCHINSON, AND C; C. HAMILTON. ROTARY PUMP. I r

APPLICATION FILED OCT 20. W20. I I

Patented Mar. 14, 1922,

2 SHEETS-SHEET 2- .ggg

IIIIIIIA I N. lmhoft. t h Hukhmson.

A TTORNEYS oyd M 'lmm lIII mun:

WITNESSES FLOYD NELSON IMHOFF, JOSEPH HUTCHINSON, AND

- OF GULL LAKE, SASKATCHEWAN,

CLIFFORD COATES HAMILTON,

CANADA.

ROTARY PUMP.

Specification of Letters Patent.

Patented Mar. 14, 1922.

g Application filed October 20,1920. Serial No. 418,284.

T 0 all whom it may concern Be it known that we, F LOYI) N. IMHOFF,JosErH HUTCHINSON, and Cmrrono C. HAMILTON, all subjects of the King ofGreat Britain, and residents of (iull Lake, in the Province ofSaskatchewan and Dominion of Canada, have invented certain new anduseful Improvements in Rotary Pumps, of which the following is aspecification.

ur invention is an improvement in pumps, and has for its object to proyide a pump of the rotary type, comprising a rotor and a stator casingin which the rotor is mounted. the casing having inlet and. dischargepipes for the fluid to be pumped.

In the drawings:

Figure 1 is a side view of the pump with parts in section,

Figure 2 is a top plan view.

Figures 3 and 4 are sections on the lines 3-3 and 44 -'respectivcly ofFigure 1,

Figure 5 is a perspective view of a portion of the rotor showing one ofthe vanes or blades removed. i I

In the present embodiment of the invention. a pair of similar heads 1 isprovided, each of which is provided at its center with a hub portion 2in which is held a bushing 3, and a shaft 4 is journaled in the bushingsof the two heads. A ring 5 is arranged between the heads. and the headsand rings are clamped together by bolts and nuts 6 which pass throughradial lugs 7 extending from the heads.

An inlet pipe 8 is arranged co-axially with the shaft 4 at one side ofthe rotor casing constituted by the heads and rings, and an outlet ordischarge pipe 9 is arranged at the opposite sides. These pipes 8 and 9are approximately half circles, being arched to extend concentric withthe shaft 4, and each pipe has at the top of the casing a connection 10and 11 respectively for connection with a source of supply and adischarge pipe or reservoir, respectively,

Ports or passages 12, 13, 14 and 15 are provided near the ends of thepipes 8 and 9, the said ports or passages forming a communicationbetween the pipes and the interior of the rotor casing, and it will benoticed that the pq rts or passages 12 and 13 which connect the pipe 8with the rotor casing, are almost diametrically opposite. The same istrue of the ports 14 and 15 which connectthe -pipe 9 with the interiorof the rotor casing.

A rotor 16 is secured the casing, the rotor shaft as indicated in andthis rotor has a 17, five in number in in each of which there isarranged a blade or 'vane 18. A spring 19 is seated beneath each bladeor vane, and acts normalh to force the blade orvane outwardly as shownin F1gures 1, 3 and 4, and the rotor is at the edges of its peripheralsurface and on opposite sides of the blades or vanes expansion rings 20which form a seal between the rotor and the rotor casing.

Referring to Figures 3 and 4, it will be seen that each of the heads 1is annularlv reamed or counter-bored on its inner face so that there isa marginal inwardly extending rib for each head, and it is this rib thatabuts the ring 5, the rotor fitting within the counter-bores or reams ofthe head.

The operation of the improvement is as follows: Referring to Figure 1.when that blade which is just below the port 12 moves downwardly withthe rotor, it tends to create a vacuum within that portion of the rotorcasing which is directly above the blade, that is, behind the blade.Liquid will flow through the port 12 into this portion of the rotorcasing, and as the said'blade moves further and down toward the port 14,a succeeding blade will come into position past the port 12, acting toforce this liquid onward.

When the first named blade passes the port 13 the water will be drivenout of the port 14 into the pipe 9 from whence it will pass to thereservoir or place of discharg At the right of Figure 1, the operationis the same, the liquid being drawn in through the port 13 and drivenout through the port 15. Thus both sides of the pump will be actingsimultaneously, two blades being always cooperating with one side of thepump, in active operation. v 1

Referring to Figure 1, it will be seen that the rotor touches the rotorcasing at diametrically opposite points, and that these points arebetween the ports 1215 and 14-13. Thus two inlet- 5 chambers are formed,one at each side of the, pump. The interior of the casing is so shapedthat as to the shaft 4 within being keyed to the Figures 1, 3 and 4,series of radial slots the present instance,

the blades or vanes pass the ports 1415 they will be moved inward, whileas they pass the ports 12-13 they may move outward. I

It will be understood that while the device is a rotary pump, it is alsoa motor, working with equal efficiency in either direction, as a pump oras a motor. One utilization of the device will be as a transmission formotor cars.

I claim 1. A rotary pump comprising a stator including a palr of headshaving hubs at their center and laterally extending annular ribs attheir peripheries, a ring arranged between the ribs of the head andworking chambers formed therein, means for securing the heads and thering together, the ring being provided with diametrically opposite andinwardly extending enlargements, a shaft journaled in the hubs of saidheads, a rotor keyed to said shaft and having its peripheral surfacecontacting with.the enlargements of the head of the ring and havinglaterally extending annular flanges at its periphery engaging theannular ribs of the stator, packing rings carried by the flanges of therotor and engaging the ribs and stator, said rotor having radial slotsextending transversely thereof between the flanges, sliding pistonsarranged Within the slots, a spring for urging said sliding pistonsoutwardly into engagement with the ring, an arcuate inlet pipe coaxialwith the stator and having connections therewith, one on one side of oneof said enlargements and the other on the other sideof the other of saidenlargements, and an arcuate outlet pipe coacting with the stator andlongitudinally spaced from the inlet pipe and having connections withthe stator, the connections of the outlet pipe being spacedcircumferentially from the annular pidpe and one of said connectionsbeing dispose on one side of said enlargements and the other of saidconnections belng dis vided with diametrically opposed and inwardlyextending enlargements and having working chambers formed between saidenlargements, a rotor operating in the stator and contacting with theenlargements, spring pressed sliding pistons carried by the rotor andengageable with the ring, an arcuate inlet pipe having connections withthe stator and an arcuate outlet pipe having connection with the stator.

3. A rotary pump comprising a stator including a pair of heads havinghubs at their center and laterally extending annular ribs at theirperipheries, a ring arranged between the ribs of the head and havingworking chambers formed therein, means for securing the heads and thering together, the ring being provided with diametrically opposite andinwardly extending enlargements, a shaft journaled in the hubs of saidheads, a rotor keyed to said shaft and having its peripheral surfacecontacting with the enlargements of the head of the ring and havinglaterally extending annular flanges at its periphery engaging theannular ribs of the stator, packing rings carried b the flanges of therotor and engaging the ri s and stator,

said rotor having radial slots extending transversely thereof betweenthe flanges,

sliding pistons arranged within the slots, and

a spring for urging said sliding pistons outwardly into engagement withthe ring.

FLOYD NELSON IMHOFF.

. JOSEPH HUTCHINSON.

CLIFFORD COATES HAMILTON.

Witnesses:

HJOLMES E. LEAF, FLORENQE V. DEWAR.

